Cryptology ePrint Archive: BibTeX Citation of Report 2009/465

@misc{cryptoeprint:2009:465,
    author = {Rishab Nithyanand and Gene Tsudik and Ersin Uzun},
    title = {Readers Behaving Badly: Reader Revocation in PKI-Based RFID Systems},
    howpublished = {Cryptology ePrint Archive, Report 2009/465},
    year = {2009},
    note = {\url{http://eprint.iacr.org/}},
}

You will need the url.sty package (comes with most LaTeX installations) for the last line. Otherwise, remove the \url command.